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Full Record Details
DOI
10.5286/raltr.2016012
Persistent URL
http://purl.org/net/epubs/work/31523030
Record Status
Checked
Record Id
31523030
Title
A thermal impulse method to measure the strength of conducting materials at high temperatures and strain rates
Contributors
JRJ Bennett (STFC Rutherford Appleton Lab.)
Abstract
A method of measuring the strength of conducting materials and Young’s modulus of elasticity at high temperatures and strain rates is described. A pulse of electrical current is passed through a thin wire at high temperatures to excite a thermal strain oscillation and corresponding stress. At some combination of temperature and stress the wire will fail. The stress is measured by calculation from the current pulse. Measurements have been made on tungsten at temperatures up to ~3000 K, tantalum up to ~2000 K and molybdenum up to ~2000 K, at strain rates of ~103 s-1. The frequency of the oscillations gives Young’s modulus of elasticity. While the method is good for measuring ultimate tensile strengths of materials at high temperatures it is limited in the minimum temperature that can be measured. An example is given for tungsten where the strength is not measurable below a temperature of ~700°C.
Organisation
ISIS
,
STFC
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Licence Information:
Creative Commons Attribution 3.0 Unported (CC BY 3.0)
Language
English (EN)
Type
Details
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Year
Report
RAL Technical Reports
RAL-TR-2016-012. 2016.
RAL-TR-2016-012.pdf
2016
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